WO2020063478A1

WO2020063478A1 - Method executed by user device and user device

Info

Publication number: WO2020063478A1
Application number: PCT/CN2019/107027
Authority: WO
Inventors: 罗超; 刘仁茂
Original assignee: 夏普株式会社; 罗超
Priority date: 2018-09-28
Filing date: 2019-09-20
Publication date: 2020-04-02
Also published as: CN110971553A

Abstract

Provided in the present invention is a method executed by a user device and a user device, the method comprising: acquiring configuration information of parameters related to the generation of an orthogonal frequency division multiplexing OFDM baseband signal of a physical channel or signal; and, on the basis of the acquired configuration information of the parameters, generating the OFDM baseband signal of the physical channel or signal, using a correction parameter for correcting the frequency offset when generating the OFDM baseband signal of the physical channel or signal. Resource block alignment between NR and LTE can thus be implemented, enabling high efficiency dynamic time frequency resource sharing between NR and LTE.

Description

Method performed by user equipment and user equipment

Technical field

The present invention relates to the field of wireless communication technologies, and in particular, to a method performed by a user equipment, a method performed by a base station, and a corresponding user equipment.

Background technique

In March 2016, a new research project on 5G technology standards (see Non-Patent Document 1) was approved at the 3rd Plenary Meeting of 3GPP (3rd Generation Partnership Project) RAN # 71. The purpose of this research project is to develop a new wireless (New Radio: NR) access technology to meet all application scenarios, requirements and deployment environments of 5G. NR mainly has three application scenarios: enhanced mobile broadband communication (Enhanced Mobile Broadband: eMBB), large-scale machine type communication (massage Machine Type Communication: mMTC), and ultra-reliable low-latency communication (URLLC) . In June 2017, at the 3GPP RAN # 75 plenary meeting, the corresponding 5G NR work item (see Non-Patent Document 2) was approved.

The waveform supported by 5G in the downlink direction is CP-OFDM (Cyclic Prefix Orthogonal Frequency Division Multiplexing, cyclic prefix orthogonal frequency division multiplexing). The waveforms supported in the uplink direction include CP-OFDM and DFT-s-OFDM (Discrete Fourier Transformation Spread Orthogonal Frequency Division Multiplexing (Discrete Fourier Transform Spread Spectrum Orthogonal Frequency Division Multiplexing).

In 5G, the difference between CP-OFDM and DFT-s-OFDM is that the latter performs a operation called "transform precoding" after the layer mapping operation, while the former does not perform this operating.

The key parameters of CP-OFDM and DFT-s-OFDM are the subcarrier spacing and cyclic prefix length. In 5G, for a given waveform (such as CP-OFDM, or DFT-s-OFDM), multiple parameter sets (numerology) are supported in a cell. Unless otherwise specified, it refers to the subcarrier interval; sometimes (Refers to subcarrier spacing and cyclic prefix length). The waveform parameter set supported by 5G is shown in Table 1, which defines two types of cyclic prefixes, "normal" and "extended".

Table 1 Waveform parameter set supported by 5G

μμ	Δf＝2 ^μ·15[kHz] Δf = 2 ^μ · 15 [kHz]	循环前缀(Cyclic prefix)Cyclic prefix
00	1515	正常(Normal)Normal
11	3030	正常normal
22	6060	正常，扩展(Extended)Normal, Extended
33	120120	正常normal
44	240240	正常normal

On a carrier of a given transmission direction (recorded as x, where x = DL means downlink, that is, downlink, if x = UL means uplink, that is uplink, or supplementary uplink, that is, supplementary uplink), Each waveform parameter set μ (configured by the high-level parameter subcarrierSpacing) defines a resource grid (also referred to as a subcarrier-specific carrier, SCS-specific carrier), which includes in the frequency domain

Subcarriers (i.e.

Resource blocks, each resource block contains

Subcarriers) in the time domain

OFDM symbols (that is, the number of OFDM symbols in a subframe, the specific value is related to μ), where

Refers to the number of subcarriers in a resource block (resource block, RB, which can be numbered with a common resource block or a physical resource block, etc.),

The lowest numbered common resource block (CRB) of the resource grid

Configured by high-level parameter offsetToCarrier, the number of frequency domain resource blocks

Configured by the high-level parameter carrierBandwidth. among them,

● The common resource block is defined for the waveform parameter set. For example, for μ = 0 (ie, Δf = 15kHz), the size of a common resource block is 15 × 12 = 180kHz, and for μ = 1 (ie, Δf = 30kHz), the size of a common resource block is 30 × 12 = 360kHz .

For all waveform parameter sets, the center frequency of subcarrier 0 of common resource block 0 points to the same position in the frequency domain. This position is also called "point A".

All subcarrier interval configurations defined in a carrier and their corresponding resource grids can be configured by the parameter scs-SpecificCarrierList.

For each waveform parameter set, one or more "bandwidth parts" (BWP) can be defined. Each BWP contains one or more consecutive common resource blocks. Assuming the number of a BWP is i, its starting point

And length

The following relationships must be met at the same time:

That is, the common resource block contained in the BWP must be located in the corresponding resource grid.

The common resource block number is used, that is, it represents the distance from the lowest numbered resource block of the BWP to the "point A" (represented by the number of resource blocks).

A resource block in a BWP is also called a "physical resource block" (PRB), and its number is

Wherein physical resource block 0 is the lowest numbered resource block of the BWP, corresponding to the common resource block

The uplink and downlink BWPs used by the UE during initial access are called initial active uplink BWP (initial active uplink BWP) and initial active downlink BWP (respectively). In addition to the initial access, the uplink and downlink BWPs used are called active uplink BWP (active uplink BWP) and active downlink BWP (active downlink BWP), respectively.

The number of subcarriers in a resource block is

(That is, the lowest numbered subcarrier is subcarrier 0, and the highest numbered subcarrier is subcarrier

), Regardless of whether the resource block uses a common resource block number or a physical resource block number.

In the time domain, the uplink and downlink are composed of multiple 10ms radio frames (radio frames, or system frames, sometimes referred to as frames, frames, numbered 0 to 1023), where each frame contains 10 1ms sub-frames (subframes, numbered 0-9 in the frame), each sub-frame contains

Slots (slots, numbered in the sub-frame

), And each time slot contains

OFDM symbols. Table 2 shows the different subcarrier spacing configurations.

with

The value of. Obviously, the number of OFDM symbols in each subframe

Table 2 Time domain parameters related to subcarrier interval configuration μ

The basic time unit of 5G is T _c = 1 / (Δf _max · N _f ), where Δf _max = 480 · 10 ³ Hz, and N _f = 4096. The constants k = T _s / T _c = 64, where T _s = 1 / (Δf _ref · N _{f, ref} ), Δf _ref = 15 · 10 ³ Hz, N _{f, ref} = 2048.

When there is no risk of confusion, the subscript x of a mathematical symbol indicating the transmission direction can be removed. For example, for a given downlink physical channel or signal, you can use

Represents the number of resource blocks in the frequency domain of the resource grid corresponding to the subcarrier interval configuration μ.

In the existing 3GPP standard specifications on 5G, the OFDM baseband signal generation formula for other physical channels or signals except PRACH (Physical random-access channel, physical random access channel) can be expressed as

among them,

● p is the antenna port.

● μ is the subcarrier interval configuration, and Δf is its corresponding subcarrier interval, see Table 1.

L is the number of OFDM symbols in a subframe,

●

-For l = 0,

● For l ≠ 0,

●

● for extended cyclic prefix,

For normal cyclic prefixes, and l = 0 or l = 7 · 2 ^μ ,

For normal cyclic prefixes, and l ≠ 0 and l ≠ 7 · 2 ^μ ,

● μ ₀ is the maximum value of the subcarrier interval configuration for the corresponding carrier, such as the maximum value of all subcarrier interval configurations configured in the high-level parameter scsSpecificCarrierList (also called scs-SpecificCarrierList).

In the existing 3GPP standard specifications on 5G, the PRACH OFDM baseband signal generation formula can be expressed as

among them,

● p is the antenna port.

For initial access, μ is the subcarrier interval configuration of the initial effective uplink BWP, and Δf is its corresponding subcarrier interval, see Table 1. For non-initial access, μ is the subcarrier interval configuration of the effective uplink BWP, and Δf is its corresponding subcarrier interval, see Table 1.

K = Δf / Δf _RA .

●

● μ ₀ is the maximum value of the subcarrier interval configuration for the corresponding carrier, such as the maximum value of all subcarrier interval configurations configured in the high-level parameter scsSpecificCarrierList.

For initial access,

Is the lowest numbered resource block of the initial valid uplink BWP. For non-initial access,

Is the lowest numbered resource block for the effective uplink BWP.

For initial access,

The offset of the lowest numbered resource block occupied by the lowest PRACH transmission occasion in the frequency domain relative to the lowest numbered resource block (that is, physical resource block 0) of the initial valid uplink BWP (represented by the number of resource blocks) . For non-initial access,

Is the offset (represented by the number of resource blocks) of the lowest numbered resource block occupied by the lowest PRACH transmission occasion in the frequency domain relative to the lowest numbered resource block (ie, physical resource block 0) of the effective uplink BWP.

N _RA is an index of PRACH transmission opportunities in the frequency domain used by the OFDM baseband signal of the PRACH. A PRACH transmission described by the PRACH OFDM baseband signal corresponds to a PRACH transmission opportunity (depicted by n _RA ) in a frequency domain and a PRACH transmission opportunity (determined by

description).

●

Is the number of resource blocks occupied by PRACH transmission opportunities in each frequency domain. For initial access, it is expressed in terms of the number of PUSCH (Physical uplink shared channel) resource blocks on the initial effective uplink BWP. For non-initial access, the Way to express.

●

Among them, for Δf _RA ∈ {1.25, 5} kHz, n = 0; for Δf _RA ∈ {15, 30, 60, 120} kHz, n is an interval

And time 0 or time in a subframe

The number of overlaps.

For Δf _RA ∈ {1.25, 5, 15, 30} kHz,

Is the starting position of the PRACH preamble in a subframe; for Δf _RA ∈ {60, 120} kHz,

It is the starting position of the PRACH preamble in a 60kHz time slot.

For l = 0,

For l ≠ 0,

among them,

■ Assume that the subframe or 60 kHz slot starts at t = 0.

■ It is assumed that the timing advance N _TA = 0.

■ Yes

with

The explanation is the same as that in the OFDM baseband signal generation formula of the corresponding quantity in physical channels or signals other than PRACH (Physical random-access channel).

For Δf _RA ∈ {1.25, 5} kHz, it is assumed that μ = 0; in other cases μ takes the value of μ corresponding to Δf _RA ∈ {15, 30, 60, 120} kHz, see Table 1.

■

among them,

◆ l ₀ comes from the "starting symbol" in the random access configuration. For example, if the PRACH configuration index is 0, the start symbol is 0.

◆

Is a PRACH transmission occasion in a PRACH slot, and its number is

Among them, for L _RA = 839,

For L _RA = 139,

From the "number of time-domain PRACH occasions within a PRACH slot" in the random access configuration.

◆

From "PRACH duration" in random access configuration.

◆ For Δf _RA ∈ {1.25, 5, 15, 60} kHz,

◆ For Δf _RA ∈ {30, 120} kHz, and "Number of PRACH slots within a subframe" or "PRACH slots within 60 kHz slots" in the random access configuration Number "(Number of PRACH slots within a 60kHz slot) is equal to 1, then

◆ In other cases,

_{_{● L RA, Δf RA, N}} u , and

Depends on the format of the PRACH preamble. For example, for format _{0, L RA = 839, Δf} RA = 1.25kHz, N u = 24576k,

●

with

Depends on the combination of L _RA , Δf _RA , Δf. For example, for L _RA = 839, Δf _RA = 1.25kHz and Δf = 15kHz,

● If the PRACH preamble format in the random access configuration is A1 / B1, A2 / B2 or A3 / B3, then

■ If

Then, a corresponding PRACH preamble in B1, B2 or B3 format is transmitted in the PRACH transmission opportunity.

■ Otherwise, the corresponding PRACH preamble in A1, A2 or A3 format is transmitted in the PRACH transmission opportunity.

For comparison, the uplink SC-FDMA baseband signal of LTE can be expressed as follows:

among them,

● 0≤t <(N _{CP, l} + N) × T _s .

-N = 2048.

T _s is the basic time unit of LTE. T _s = 1 / (15000 × 2048) seconds.

●

-Δf = 15 kHz.

● p is the antenna port.

●

Is the content of the resource element (k, l) on the antenna port p.

L is the number of SC-FDMA symbols in an uplink slot. The SC-FDMA symbols in an uplink time slot must be transmitted in ascending order of l, starting with l = 0. For SC-FDMA symbols with l> 0, the start time is in the time slot

●

Is the uplink carrier bandwidth, with RB (resource block, resource block) as a unit.

●

Is the RB size in the frequency domain, expressed as the number of subcarriers.

For extended cyclic prefixes, and l = 0, 1, ..., 5, N _{CP, l} = 512.

For normal cyclic prefixes, and l = 0, _{NCP, l} = 160.

-For normal cyclic prefixes, and l = 1, 2, ..., 6, _{CP, l} = 144.

Introduced in LTE baseband signals

Frequency shift. In order to allow NR and LTE to dynamically share time-frequency resources on the same uplink carrier frequency, the design of NR introduced

The frequency offset option enables NR and LTE to achieve subcarrier alignment. Of course, because LTE only supports Δf = 15kHz in the uplink (except PRACH), the scenario where NR and LTE coexist only considers the case of Δf = 15kHz (for NR, that is μ = 0).

Specifically, for some specific frequency bands, such as the SUL frequency band and the frequency bands n1, n2, n3, n5, n7, n8, n20, n28, n66, and n71, an RF reference frequency for the NR uplink carrier or supplementary uplink carrier is introduced into an offset Shift Δ _shift :

F _{REF_shift} = F _REF + Δ _shift

Among them, the value of Δ _shift is determined by the high-level parameter frequencyShift7p5khz: if the parameter frequencyShift7p5khz is not configured, Δ _shift = 0 kHz; if the parameter frequencyShift7p5khz is configured, Δ _shift = 7.5 kHz.

It can be seen that, unlike LTE, which is offset by 7.5kHz at the baseband, NR is offset by 7.5kHz at the RF end.

The problem is that from the NR's OFDM baseband signal generation formula described above, it can be seen that NR also introduces the following offsets in baseband that are not in LTE:

As can be seen,

Is always equal to 0, and for other μ values, that is, when μ ≠ μ ₀ ,

Generally not equal to 0. In particular, when the number of frequency domain resource blocks of the resource grid corresponding to μ

When it is odd,

surely not

Integer multiples, which also means

surely not

An integer multiple of

The corresponding frequency offset is not an integer number of RBs. When the NR and LTE share the same uplink carrier frequency (or the uplink carrier frequency partially overlaps), the RB boundary between the resource grid corresponding to Δf = 15kHz and the LTE carrier not aligned. Figure 1 shows the case where such RB boundaries are not aligned. RB boundary misalignment makes time-frequency resource sharing between NR and LTE very inefficient. For example, because one RB in LTE and two RBs (partial) in NR overlap at the same time, when a certain RB is used in LTE, Neither the corresponding two RBs in the NR can be scheduled. Therefore, there is a need to improve the way of uplink carrier frequency offset in the existing 3GPP standard specifications on 5G to achieve efficient dynamic time-frequency resource sharing between NR and LTE.

Prior art literature

Non-patent literature

Non-Patent Document 1: RP-160671, New SID Proposal: Study on New Radio Access Technology

Non-Patent Document 2: RP-170855, New WID, New Radio Access Technology

Summary of the Invention

In order to solve at least a part of the above problems, the present invention provides a method performed by user equipment and user equipment, which can enable NR and LTE to achieve resource block alignment, thereby enabling efficient dynamic time-frequency resource sharing between NR and LTE. .

According to the present invention, a method performed by user equipment is provided, including: obtaining configuration information of parameters related to generation of an orthogonal frequency division multiplexed OFDM baseband signal of a physical channel or signal; and according to the obtained parameters, The configuration information generates an OFDM baseband signal of the physical channel or signal, and when generating the OFDM baseband signal of the physical channel or signal, a correction parameter that corrects a frequency offset is used.

In the above method, the physical channel or signal may be a physical random access channel PRACH or other physical channels or signals other than PRACH.

According to the present invention, a method performed by a user equipment is provided, including: obtaining configuration information of parameters related to the configuration of an uplink carrier or a supplementary uplink carrier; and determining the uplink carrier or Supplementing an offset amount of an RF reference frequency of an uplink carrier; and applying the offset amount to the RF reference frequency, and in determining the offset amount, a correction parameter that corrects a frequency offset is used.

In the above method, the value of the correction parameter may be a predefined value, or the value of the correction parameter is

or

among them,

Equal to the frequency offset term related to the subcarrier spacing configuration μ

In the case where μ is a value corresponding to μ ₁ , μ ₁ is equal to a value selected according to a predefined rule in a subcarrier interval configuration for a corresponding carrier.

In the above method, the frequency offset term may be

Calculated by:

among them,

with

The number of the lowest numbered common resource block and the number of frequency resource blocks of the resource grid corresponding to the subcarrier interval configuration μ;

with

The numbers of the lowest numbered common resource blocks and the number of frequency resource blocks of the resource grid corresponding to the reference subcarrier interval configuration μ ₀ , respectively;

Is the number of subcarriers in a resource block.

In the above method, the correction parameter may be a first constant when a given condition is not satisfied, and a second constant different from the first constant when the given condition is satisfied.

In the above method, the given condition may include at least one of the following conditions:

Number of frequency resource blocks in the resource grid

Odd number

The parameter indicating the 7.5kHz frequency offset for uplink transmission has been configured;

The corresponding carrier of the OFDM baseband signal of the physical channel or signal, or the uplink carrier or supplementary uplink carrier in any one of SUL, n1, n2, n3, n5, n7, n8, n20, n28, n66, n71 on;

There is a configuration of μ = 0 in the subcarrier interval configuration for the corresponding carrier, or the uplink carrier or the supplementary uplink carrier.

In the above method, the acquired parameters may include an indication parameter for performing a 7.5 kHz frequency offset on uplink transmission.

In the above method, the shift amount Δ _{shift of} the RF reference frequency may be represented by Δ _shift = S ₁ + S ₂ , where S ₁ is 0 kHz when the indication parameter is not configured, and the indication parameter 7.5 kHz when configured; S ₂ is the correction parameter.

According to the present invention, a user equipment is provided, including: a processor; and a memory storing instructions; wherein the instructions execute the above method when run by the processor.

Invention effect

According to the method performed by the user equipment and the user equipment according to the present invention, the manner of uplink carrier frequency offset in the existing 3GPP standard specifications for 5G is improved, and resource block alignment can be achieved between NR and LTE, thereby enabling NR and LTE. Efficient dynamic time-frequency resource sharing between them.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other features of the present invention will become more apparent through the following detailed description in conjunction with the accompanying drawings, in which:

Figure 1 shows the existing 3GPP standard specifications for 5G.

Schematic diagram that may cause misalignment of RB boundaries in the NR and LTE coexistence scenario.

FIG. 2 is a flowchart illustrating a method performed by a user equipment according to Embodiment 1 of the present invention.

FIG. 3 is a flowchart illustrating a method performed by a user equipment according to Embodiment 2 of the present invention.

FIG. 4 is a flowchart illustrating a method performed by a user equipment according to Embodiment 3 of the present invention.

5 is a flowchart illustrating a method performed by a user equipment according to Embodiment 4 of the present invention.

FIG. 6 is a block diagram showing a user equipment UE according to the present invention.

detailed description

The present invention is described in detail below with reference to the drawings and specific embodiments. It should be noted that the present invention should not be limited to the specific embodiments described below. In addition, for the sake of simplicity, detailed descriptions of well-known technologies that are not directly related to the present invention are omitted to prevent confusion in the understanding of the present invention.

The following takes the 5G mobile communication system and its subsequent evolved versions as an example application environment, and specifically describes various embodiments according to the present invention. However, it should be noted that the present invention is not limited to the following embodiments, but can be applied to more other wireless communication systems, such as a communication system after 5G and a 4G mobile communication system before 5G.

Some terms related to the present invention are described below. Unless otherwise specified, the terms related to the present invention are defined here. The terms given in the present invention may adopt different naming methods in LTE, LTE-Advanced, LTE-Advanced Pro, NR, and later communication systems. However, in the present invention, a unified term is used. When applied to a specific system, Can be replaced with terms used in the respective system.

3GPP: 3rd Generation Partnership Project, Third Generation Partnership Project

BWP: Bandwidth Part

CP-OFDM: Cyclic Prefix Orthogonal Frequency Division Multiplexing, cyclic prefix orthogonal frequency division multiplexing

CRB: Common Resource Block, physical resource block

CSI-RS: Channel-state information reference signal

DCI: Downlink ControlInformation, downlink control information

DFT-s-OFDM: Discrete Fourier Transformation Spread Orthogonal Frequency Division Multiplexing, Discrete Fourier Transform Spread Spectrum Orthogonal Frequency Division Multiplexing

DM-RS: Demodulation reference signal

eMBB: Enhanced Mobile Broadband, Enhanced Mobile Broadband Communication

IE: Information Element

LTE: Long Term Evolution, Long Term Evolution

LTE-A: Long-Term Evolution-Advanced

MAC: Medium Access Control

MAC CE: MAC Control Element

mMTC: massive Machine type Communication, large-scale machine communication

NR: New Radio

OFDM: Orthogonal, Frequency, Division, Multiplexing, Orthogonal Frequency Division Multiplexing

PBCH: Physical Broadcast Channel

PDCCH: Physical Downlink Control Channel

PDSCH: Physical Downlink Shared Channel

PRACH: Physical random-access channel

PRB: Physical Resource Block

PT-RS: Phase-tracking reference signal

PUCCH: Physical Uplink Control Channel

PUSCH: Physical uplink shared channel

Random Access Preamble

RB: Resource Block, resource block

RF: Radio Frequency

RRC: Radio Resource Control

SC-FDMA: Single-carrier Frequency-division Multiple Access, single carrier frequency division multiple access

SRS: Sounding reference signal

SSB: SS / PBCH block, synchronization signal / physical broadcast channel block

SUL: Supplementary Uplink

UE: User Equipment

URLLC: Ultra-Reliable and Low latency Communication, ultra-reliable and low-latency communication

Unless otherwise specified, in all examples and implementations of the present invention:

For initial access, "uplink BWP" refers to "initial active uplink BWP". For example, configuration can be performed through initialUplinkBWP in uplinkConfigCommon in SIB1 (System information block 1).

For non-initial access, "uplink BWP" refers to "active uplink BWP". For example, it can be configured through uplinkBWP-ToAddModList in uplinkConfig in ServingCellConfig and IE.

● The use and interpretation of mathematical symbols and mathematical expressions use the existing technology. E.g,

■

Refers to the number of subcarriers in a resource block (such as a common resource block or a physical resource block),

■

[Example 1]

In the first embodiment of the present invention, the steps performed by the user equipment UE include:

In step 101, configuration information of parameters related to generation of OFDM baseband signals of physical channels or signals other than PRACH is acquired. For example, the parameter configuration information is obtained from a base station. The parameters include:

● The configuration of the resource grid corresponding to the waveform parameter set involved in the OFDM baseband signal of the physical channel or signal other than PRACH.

For example, the number of the lowest numbered common resource block of the resource grid corresponding to the subcarrier interval configuration μ used by the OFDM baseband signal of the physical channel or signal other than PRACH is

The number of frequency domain resource blocks is

Said

with

It can be configured respectively by the parameter offsetToCarrier and the parameter carrierBandwidth in the SCS-SpecificCarrier IE corresponding to μ.

As another example, the number of the lowest-numbered common resource block of the resource grid corresponding to the reference subcarrier interval configuration μ ₀ is

The number of frequency domain resource blocks is

The reference subcarrier interval configuration μ ₀ is the maximum value in the subcarrier interval configuration for the corresponding carrier, such as the maximum value of all subcarrier interval configurations configured in the high-level parameter scsSpecificCarrierList. Said

with

It can be configured respectively by the parameter offsetToCarrier and the parameter carrierBandwidth in the SCS-SpecificCarrier IE corresponding to μ ₀ .

In step 103, the OFDM baseband signals of other physical channels or signals other than PRACH are generated according to the configuration information of the parameters related to the generation of OFDM baseband signals of other physical channels or signals other than PRACH. For example, the OFDM baseband signals of the physical channels or signals other than PRACH may be time-continuous signals.

Represented as one of the following three formulas (called formula one, formula two, and formula three in the order of appearance):

●

●

●

among them,

● p is the antenna port.

L is the number of OFDM symbols in a subframe,

●

-For l = 0,

● For l ≠ 0,

●

● for extended cyclic prefix,

For normal cyclic prefixes, and l = 0 or l = 7 · 2 ^μ ,

For normal cyclic prefixes, and l ≠ 0 and l ≠ 7 · 2 ^μ ,

● k _s is a correction parameter that corrects the frequency offset, and the unit can be kHz. The value of k _s can be one of the following:

K _s is equal to a predefined value. For example, the predefined value is equal to 0, or

or

among them,

◆

equal

Substituting μ = 0

Value after the expression.

◆ If

Since Δf = 2 ^μ · 15kHz, it is used to indicate

The formula one can also be expressed as

The value of k _s is one of a set of predefined values. For example, the value of k _s is determined according to a predefined condition or pre-configured information or an indication of DCI or an indication of MAC CE or an indication of RRC signaling or a configuration of an RRC parameter.

For example, when the predefined conditions are not met, k _s does not exist or is equal to one of the set of predefined values; when the predefined conditions are met, k _s is equal to the set of predefined values The other of the values.

For example, the predefined condition may be any combination of one or more of the following in an "and" or "or" relationship:

◆

Odd number

◆ The parameter frequencyShift7p5khz has been configured.

◆ The carrier corresponding to the OFDM baseband signal of the physical channel or signal other than PRACH is on one of the SUL frequency bands or the frequency bands n1, n2, n3, n5, n7, n8, n20, n28, n66, n71.

◆ There is a configuration of μ = 0 in the subcarrier interval configuration for the corresponding carrier (such as all subcarrier interval configurations configured in the high-level parameter scsSpecificCarrierList).

For example, the set of predefined values may include 0,

with

One or more of them.

■

among them,

equal

Substituting μ = μ ₁

Value after the expression.

For example, μ ₁ may be equal to a value selected according to a predefined rule, such as a minimum value, in a subcarrier interval configuration for a corresponding carrier (for example, all subcarrier interval configurations configured in a high-level parameter scs-SpecificCarrierList).

■

among them,

equal

Substituting μ = μ ₁

Value after the expression.

For example, μ ₁ may be equal to a value selected according to a predefined rule, such as a minimum value, in a subcarrier interval configuration for a corresponding carrier (such as all subcarrier interval configurations configured in a high-level parameter scs-SpecificCarrierList).

● Optionally, whether k _s is present can be indicated through DCI, MAC CE, or RRC signaling, or determined through the configuration of RRC parameters.

In the first embodiment of the present invention, the other physical channels or signals except PRACH may include: PUSCH, PUCCH, SRS, PT-RS, DM-RS, CSI-RS, PSS, SSS, PDSCH, PDCCH, PBCH, etc. .

According to the above method of the first embodiment of the present invention, the manner of uplink carrier frequency offset in the existing 3GPP standard specifications for 5G is improved, and resource block alignment can be achieved between NR and LTE. Efficient dynamic time-frequency resource sharing.

[Example 2]

In the second embodiment of the present invention, the steps performed by the user equipment UE include:

In step 201, configuration information of parameters related to generation of an OFDM baseband signal of PRACH is acquired. For example, obtain one or more of the following parameter configuration information from the base station:

● Configuration of uplink BWP. For example, the subcarrier interval of the uplink BWP is configured as μ (the corresponding subcarrier interval is Δf), and the lowest numbered resource block (using a common resource block number) is

● Random access configuration. For example, for a paired spectrum in frequency range 1 (FR1), if the PRACH Configuration Index (for example, configured by the high-level parameter prach-ConfigurationIndex) is 87, the preamble format ) Is A1, the starting symbol is 0, the number of PRACH slots within a subframe is 1, and the number of time-domain PRACH opportunities in PRACH slots is 1. -domain PRACH occasions within a PRACH slot,

) Is 6, PRACH duration (PRACH duration,

) Is 2.

The configuration of the resource grid corresponding to the waveform parameter set involved in generating the PRACH OFDM baseband signal.

For example, the number of the lowest numbered common resource block of the resource grid corresponding to the subcarrier interval configuration μ of the uplink BWP is

The number of frequency domain resource blocks is

Said

with

It can be configured respectively by the parameter offsetToCarrier and the parameter carrierBandwidth in the SCS-SpecificCarrier IE corresponding to μ. As another example, the number of the lowest-numbered common resource block of the resource grid corresponding to the reference subcarrier interval configuration μ ₀ is

The number of frequency domain resource blocks is

with

-The configuration of the lowest PRACH transmission occasions in the frequency domain. For example, the offset (represented by the number of resource blocks) of the lowest PRACH transmission opportunity in the frequency domain from the lowest numbered resource block of the uplink BWP is

For example, it is configured by the high-level parameter msgl-FrequencyStart.

● The number of PRACH transmission occasions for frequency-division multiplexing (FDM) at a given time instance. For example, the number of PRACH transmission opportunities for frequency division multiplexing at a given time is M, for example, configured by the high-level parameter msgl-FDM; correspondingly, PRACH in the frequency domain used by the PRACH OFDM baseband signal The value set of the index n _RA of the transmission opportunity may be {0, 1, ..., M-1}.

In step 203, the PRACH OFDM baseband signal is generated according to the configuration information of the parameters related to the generation of the PRACH OFDM baseband signal. For example, the PRACH OFDM baseband signal may use a time-continuous signal

Expressed as

among them,

● p is the antenna port.

K = Δf / Δf _RA .

●

●

For initial access,

Is the lowest numbered resource block for the effective uplink BWP.

For initial access,

description).

●

Is the number of resource blocks occupied by PRACH transmission opportunities in each frequency domain. For initial access, it is expressed in terms of the number of PUSCH (Physical uplink shared channel) resource blocks on the initial effective uplink BWP; for non-initial access, the number of PUSCH resource blocks on the effective uplink BWP is Way to express.

●

And time 0 or time in a subframe

The number of overlaps.

For Δf _RA ∈ {1.25, 5, 15, 30} kHz,

It is the starting position of the PRACH preamble in a 60kHz time slot.

For l = 0,

For l ≠ 0,

among them,

■ Assume that the subframe or 60 kHz slot starts at t = 0.

■ It is assumed that the timing advance N _TA = 0.

■ Yes

with

■

among them,

◆

Is a PRACH transmission occasion in a PRACH slot, and its number is

Among them, for L _RA = 839,

For L _RA = 139,

◆

From "PRACH duration" in random access configuration.

◆ For Δf _RA ∈ {1.25, 5, 15, 60} kHz,

◆ In other cases,

_{_{● L RA, Δf RA, N}} u , and

●

with

■ If

or

among them,

equal

Substituting μ = 0

Value after the expression.

◆

Odd number

◆ The parameter frequencyShift7p5khz has been configured.

◆ The carrier corresponding to the PRACH OFDM baseband signal is on one of the SUL frequency bands or the frequency bands n1, n2, n3, n5, n7, n8, n20, n28, n66, and n71.

For example, the set of predefined values may include 0,

with

One or more of them.

■

among them,

equal

Substituting μ = μ ₁

Value after the expression.

■

among them,

equal

Substituting μ = μ ₁

Value after the expression.

According to the method in the second embodiment, as in the first embodiment, resource alignment between NR and LTE can be achieved, so that efficient dynamic time-frequency resource sharing between NR and LTE can be achieved.

[Example Three]

In the third embodiment of the present invention, the steps performed by the user equipment UE include:

In step 301, configuration information of parameters related to uplink carrier or supplementary uplink carrier configuration is acquired. For example, the parameter configuration information is obtained from a base station. The parameters include:

● Indicate the 7.5kHz frequency offset for uplink transmission, for example, configure it with the parameter frequencyShift7p5khz.

At step 302, configuration information about the configuration parameters based on the uplink supplementary uplink carrier or carriers, or in addition to determining the uplink carrier frequency offset of the reference uplink RF carrier Δ _shift.

For example, Δ _shift = S ₁ + S ₂ . among them,

● If the parameter frequencyShift7p5khz is not configured, then S ₁ = 0 kHz; if the parameter frequencyShift7p5khz is configured, then S ₁ = 7.5 kHz.

● S ₂ is a correction parameter that corrects the frequency offset, and the unit can be kHz. The value of S ₂ can be one of the following:

■ S ₂ is equal to a predefined value. For example, the predefined value is equal to 0, or

or

among them,

equal

Substituting μ = 0

Value after the expression.

The value of S ₂ is one of a set of predefined values. For example, the value of S ₂ is determined according to a predefined condition or pre-configured information or an indication of DCI or an indication of MAC CE or an indication of RRC signaling or a configuration of an RRC parameter.

For example, when the predefined conditions are not met, S ₂ does not exist or is equal to one of the set of predefined values; when the predefined conditions are met, S ₂ is equal to the set of predefined values The other of the values.

◆

Odd number

◆ The parameter frequencyShift7p5khz has been configured.

◆ The uplink carrier or supplementary uplink carrier is on one of the SUL frequency bands or the frequency bands n1, n2, n3, n5, n7, n8, n20, n28, n66, and n71.

◆ There is a configuration of μ = 0 in the subcarrier interval configuration for the uplink carrier or the supplementary uplink carrier (such as all subcarrier interval configurations configured in the high-level parameter scsSpecificCarrierList).

For example, the set of predefined values may include 0,

with

One or more of them.

■

among them,

equal

Substituting μ = μ ₁

Value after the expression.

For example, μ ₁ may be equal to a value selected according to a predefined rule in a subcarrier interval configuration for the uplink carrier or a supplementary uplink carrier (for example, all subcarrier interval configurations configured in a high-level parameter scs-SpecificCarrierList), such as the minimum value. value.

■

among them,

equal

Substituting μ = μ ₁

Value after the expression.

Optionally, whether S ₂ is present can be indicated by DCI, MAC CE or RRC signaling, or determined by the configuration of RRC parameters.

Wherein, in some embodiments, the descriptions of S ₁ and S ₂ in the equation Δ _shift = S ₁ + S ₂ may be combined. For example, if the parameter frequencyShift7p5khz is not configured, Δ _shift = 0kHz (for example, when S ₁ = 0kHz and S ₂ = 0kHz); if the parameter frequencyShift7p5khz is configured, then

(For example, when S ₁ = 7.5 kHz, and

).

among them

with

The definition is the same as in the first embodiment, and repeated description is omitted here.

In step 303, an offset Δ _shift is applied to the RF reference frequency, for example:

F _{REF_shift} = F _REF + Δ _shift

Optionally, the third embodiment of the present invention is only applied to the SUL frequency band, and the frequency bands n1, n2, n3, n5, n7, n8, n20, n28, n66, and n71.

According to the method in the third embodiment, as in the first embodiment, resource alignment between NR and LTE can be achieved, so that efficient dynamic time-frequency resource sharing between NR and LTE can be achieved.

[Example 4]

In the fourth embodiment of the present invention, the steps performed by the user equipment UE include:

In step 401, configuration information of parameters related to uplink carrier or supplementary uplink carrier configuration is acquired. For example, the parameter configuration information is obtained from a base station. The parameters include:

For all uplink carrier or supplementary uplink carrier sub-carrier interval configurations and the resource grid configuration corresponding to each sub-carrier interval configuration, for example, configuration through the parameter scs-SpecificCarrierList.

Wherein, the configuration information of the parameters related to the configuration of the uplink carrier or the supplementary uplink carrier satisfies one or more of the following restrictions:

● If the parameter scs-SpecificCarrierList contains a configuration related to μ = 0, then the number of frequency domain resource blocks of the resource grid corresponding to μ = 0 (

For example, configuration by the parameter carrierBandwidth in the SCS-SpecificCarrier IE corresponding to μ = 0) must be an even number.

● If the parameter frequencyShift7p5khz is configured and the parameter scs-SpecificCarrierList contains a configuration related to μ = 0, then the number of frequency domain resource blocks of the resource grid corresponding to μ = 0 (

In step 402, an offset Δ _shift of the RF reference frequency of the uplink carrier or the supplementary uplink carrier is determined according to the configuration information of the parameters related to the configuration of the uplink carrier or the supplementary uplink carrier.

For example, if the parameter frequencyShift7p5khz is not configured, Δ _shift = 0 kHz; if the parameter frequencyShift7p5khz is configured, Δ _shift = 7.5 kHz.

In step 403, an offset Δ _shift is applied to the RF reference frequency, for example:

F _{REF_shift} = F _REF + Δ _shift

Optionally, the fourth embodiment of the present invention is only applied to the SUL frequency band, and the frequency bands n1, n2, n3, n5, n7, n8, n20, n28, n66, and n71.

According to the method in the fourth embodiment, the resource blocks can be aligned between NR and LTE within the parameter configuration range allowed by the system, so that efficient dynamic time-frequency resource sharing between NR and LTE can be achieved.

FIG. 6 is a block diagram showing a user equipment UE according to the present invention. As shown in FIG. 6, the user equipment UE60 includes a processor 601 and a memory 602. The processor 601 may include, for example, a microprocessor, a microcontroller, an embedded processor, and the like. The memory 602 may include, for example, a volatile memory (such as a random access memory RAM), a hard disk drive (HDD), a non-volatile memory (such as a flash memory), or other memories. The memory 602 stores program instructions. When the instruction is executed by the processor 601, the foregoing method performed by the user equipment described in detail in the present invention may be executed.

The method and related equipment of the present invention have been described above with reference to the preferred embodiments. Those skilled in the art can understand that the methods shown above are only exemplary, and the embodiments described above can be combined with each other without any contradiction. The method of the invention is not limited to the steps and sequence shown above. The network node and user equipment shown above may include more modules, for example, may also include modules that can be developed or developed in the future and can be used for base stations, MMEs, or UEs, and so on. The various identifiers shown above are merely exemplary and not restrictive, and the present invention is not limited to specific cells as examples of these identifiers. Those skilled in the art can make many variations and modifications based on the teachings of the illustrated embodiments.

It should be understood that the foregoing embodiments of the present invention may be implemented by software, hardware, or a combination of both software and hardware. For example, the various components inside the base station and user equipment in the above embodiments can be implemented by a variety of devices, including but not limited to: analog circuit devices, digital circuit devices, digital signal processing (DSP) circuits, and programmable processing Devices, application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), programmable logic devices (CPLDs), and more.

In this application, "base station" may refer to mobile communication data and control switching centers with larger transmission power and wider coverage area, including functions such as resource allocation scheduling, data receiving and sending. "User equipment" may refer to a user's mobile terminal, including, for example, a mobile phone, a notebook, and other terminal equipment capable of wireless communication with a base station or a micro base station.

In addition, the embodiments of the invention disclosed herein may be implemented on a computer program product. More specifically, the computer program product is a product having a computer-readable medium having computer program logic encoded on the computer-readable medium. When executed on a computing device, the computer program logic provides related operations to implement The above technical solution of the present invention. When executed on at least one processor of a computing system, the computer program logic causes the processor to perform the operations (methods) described in the embodiments of the present invention. This arrangement of the present invention is typically provided as software, code, and / or other data structures, or as one or more, provided or encoded on a computer-readable medium such as an optical medium (e.g., a CD-ROM), a floppy disk, or a hard disk. ROM or RAM or other media of firmware or microcode on a PROM chip, or downloadable software images, shared databases, etc. in one or more modules. Software or firmware or such a configuration may be installed on a computing device, so that one or more processors in the computing device execute the technical solutions described in the embodiments of the present invention.

In addition, each functional module or individual feature of the base station equipment and terminal equipment used in each of the above embodiments may be implemented or executed by a circuit, which is usually one or more integrated circuits. Circuits designed to perform the functions described in this specification may include general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs) or general-purpose integrated circuits, field-programmable gate arrays (FPGAs), or other Programming logic devices, discrete gate or transistor logic, or discrete hardware components, or any combination of the above. A general-purpose processor may be a microprocessor, or the processor may be an existing processor, controller, microcontroller, or state machine. The above-mentioned general-purpose processor or each circuit may be configured by a digital circuit, or may be configured by a logic circuit. In addition, when advanced technologies capable of replacing current integrated circuits appear due to advances in semiconductor technology, the present invention can also use integrated circuits obtained using the advanced technologies.

Although the present invention has been shown in conjunction with the preferred embodiments of the present invention, those skilled in the art will understand that various modifications, substitutions and changes can be made to the present invention without departing from the spirit and scope of the present invention. Therefore, the present invention should not be limited by the foregoing embodiments, but should be defined by the appended claims and their equivalents.

Claims

A method performed by a user equipment includes:

Obtaining configuration information of parameters related to the generation of an orthogonal frequency division multiplexed OFDM baseband signal of a physical channel or signal; and

Generating an OFDM baseband signal of the physical channel or signal according to the obtained configuration information of the parameter,

When generating an OFDM baseband signal of the physical channel or signal, a correction parameter that corrects a frequency offset is used.
The method according to claim 1, wherein:

The physical channel or signal is a physical random access channel PRACH or other physical channels or signals other than PRACH.
A method performed by a user equipment includes:

Obtaining configuration information of parameters related to the configuration of an uplink carrier or a supplementary uplink carrier;

Determining, according to the obtained configuration information of the parameter, an offset of a radio frequency RF reference frequency of the uplink carrier or a supplementary uplink carrier; and

Applying the offset to the RF reference frequency,

In determining the offset, a correction parameter that corrects the frequency offset is used.
The method according to claim 1 or 3, wherein:

The value of the correction parameter is a predefined value, or the value of the correction parameter is
or

among them,
Equal to the frequency offset term related to the subcarrier spacing configuration μ
In the case where μ is a value corresponding to μ 1 , μ 1 is equal to a value selected according to a predefined rule in a subcarrier interval configuration for a corresponding carrier.
The method according to claim 4, wherein:

The frequency offset term
Calculated by:

among them,

with
The number of the lowest numbered common resource block and the number of frequency resource blocks of the resource grid corresponding to the subcarrier interval configuration μ;

with
The numbers of the lowest numbered common resource blocks and the number of frequency resource blocks of the resource grid corresponding to the reference subcarrier interval configuration μ 0 , respectively;

Is the number of subcarriers in a resource block.
The method according to claim 1 or 3, wherein:

The correction parameter is a first constant when a given condition is not satisfied, and a second constant different from the first constant when the given condition is satisfied.
The method according to claim 6, wherein:

The given condition includes at least one of the following conditions:

Number of frequency resource blocks in the resource grid
Odd number

The parameter indicating the 7.5kHz frequency offset for uplink transmission has been configured;

The corresponding carrier of the OFDM baseband signal of the physical channel or signal, or the uplink carrier or supplementary uplink carrier in any one of SUL, n1, n2, n3, n5, n7, n8, n20, n28, n66, n71 on;

There is a configuration of μ = 0 in the subcarrier interval configuration for the corresponding carrier, or the uplink carrier or the supplementary uplink carrier.
The method according to claim 3, wherein:

The obtained parameters include an indication parameter for performing a 7.5 kHz frequency offset on the uplink transmission.
The method according to claim 8, wherein:

The shift amount Δ shift of the RF reference frequency is represented by Δ shift = S 1 + S 2 ,

among them,

S 1 is 0 kHz when the indication parameter is not configured, and 7.5 kHz when the indication parameter is configured;

S 2 is the correction parameter.
A user equipment includes:

Processor; and

Memory, which stores instructions;

Wherein, the instructions execute the method according to any one of claims 1 to 9 when executed by the processor.